Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F41—WEAPONS
  • F41G—WEAPON SIGHTS; AIMING
  • F41G7/00—Direction control systems for self-propelled missiles
  • F41G7/20—Direction control systems for self-propelled missiles based on continuous observation of target position
  • F41G7/22—Homing guidance systems
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F41—WEAPONS
  • F41G—WEAPON SIGHTS; AIMING
  • F41G7/00—Direction control systems for self-propelled missiles
  • F41G7/20—Direction control systems for self-propelled missiles based on continuous observation of target position
  • F41G7/22—Homing guidance systems
  • F41G7/2213—Homing guidance systems maintaining the axis of an orientable seeking head pointed at the target, e.g. target seeking gyro
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F41—WEAPONS
  • F41G—WEAPON SIGHTS; AIMING
  • F41G7/00—Direction control systems for self-propelled missiles
  • F41G7/20—Direction control systems for self-propelled missiles based on continuous observation of target position
  • F41G7/22—Homing guidance systems
  • F41G7/224—Deceiving or protecting means
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F41—WEAPONS
  • F41G—WEAPON SIGHTS; AIMING
  • F41G7/00—Direction control systems for self-propelled missiles
  • F41G7/20—Direction control systems for self-propelled missiles based on continuous observation of target position
  • F41G7/22—Homing guidance systems
  • F41G7/2246—Active homing systems, i.e. comprising both a transmitter and a receiver
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F41—WEAPONS
  • F41G—WEAPON SIGHTS; AIMING
  • F41G7/00—Direction control systems for self-propelled missiles
  • F41G7/20—Direction control systems for self-propelled missiles based on continuous observation of target position
  • F41G7/22—Homing guidance systems
  • F41G7/2273—Homing guidance systems characterised by the type of waves
  • F41G7/2293—Homing guidance systems characterised by the type of waves using electromagnetic waves other than radio waves
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F41—WEAPONS
  • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
  • F41H13/00—Means of attack or defence not otherwise provided for
  • F41H13/0043—Directed energy weapons, i.e. devices that direct a beam of high energy content toward a target for incapacitating or destroying the target
  • F41H13/005—Directed energy weapons, i.e. devices that direct a beam of high energy content toward a target for incapacitating or destroying the target the high-energy beam being a laser beam
  • F41H13/0056—Directed energy weapons, i.e. devices that direct a beam of high energy content toward a target for incapacitating or destroying the target the high-energy beam being a laser beam for blinding or dazzling, i.e. by overstimulating the opponent's eyes or the enemy's sensor equipment
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
  • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
  • G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
  • G01S7/481—Constructional features, e.g. arrangements of optical elements
  • G01S7/4818—Constructional features, e.g. arrangements of optical elements using optical fibres
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
  • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
  • G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
  • G01S7/495—Counter-measures or counter-counter-measures using electronic or electro-optical means

Definitions

• the invention relates to an omnidirectional optronic system, or line of sight orientation head, with two axes of rotation comprising an imaging channel and a laser channel.
• the optronic system is a device for detecting, for a combat platform, guided missiles fired in its direction equipped with an optical homing head, and capable of generating a laser beam directed towards the homing head of these missiles in order to neutralize them and divert them from their target.
• Document US 6779753 B2 is also known, which discloses an omnidirectional optronic system with two axes of rotation for a combat aircraft designation nacelle, as illustrated in FIG. 2, corresponding to FIG. 1 of document US 6779753 B2 .
• the two-axis optical line of sight includes an emitting laser pupil 66 off-centered from the carrier axis 16 and a receiving pupil 58 centered on the carrier axis 16.
• the receiving laser and imaging assembly is shown as being fixed.
• the systems of the state of the art comprise a direction with a singular point to avoid, or, in other words, to avoid, that when the target object arrives on the carrying axis, there is a ambiguity and that this requires an instantaneous 180° rotation of the carrier axis.
• An object of the invention is to overcome the problems mentioned above, and in particular to be able to improve the compactness, and to limit the occultation of the imaging channel by the laser channel.
• an omnidirectional optronic system with two axes of rotation, a carrier axis and a carried axis perpendicular to each other, comprising an imaging channel and a laser channel, in which , the laser path at the injection at the system inlet and the imaging path are concentric along the carrier axis, comprising:
• a first reflecting surface placed at the input of the injection system, configured to separate the laser path from the optical path by reflecting the injected laser beam so as to move it away from the carrier axis of the system;
• an expander configured to increase the diameter of the laser beam reflected by the second reflecting surface and to reduce its divergence
• a deflector configured to modify the angular direction of the laser beam within a cone with an apex angle between 3° and 6°;
• a compensation device configured to compensate for aberrations of the spherical domed exit window
• Such a system makes it possible to completely isolate the two optical paths (imaging and laser) while effectively limiting the photometric disturbance of the imaging path by the laser path (optimization of backscattering and retroreflections from the laser towards the imaging pathway).
• the system comprises a first stage which can rotate along the bearing axis, allowing the rotation of the line of sight along the bearing axis.
• the system comprises a second stage that can rotate along the carried axis, allowing the rotation of the line of sight along the carried axis.
• the line of sight can be oriented in an angular space greater than 27tsr.
• the Kepler afocal device has a magnification comprised in the range of values [-2; -0.5]. [0015]
• This afocal enables transport of the pupil through the axes of rotation to the vicinity of the laser/imaging separator located on the bearing axis.
• the propagation of the imaging beams can take place without vignetting using components of minimized dimensions, and the volume of the line of sight orientation device is optimized.
• placing the separator in the vicinity of a pupillary plane makes it possible to minimize the disturbance of the imaging path thus generated by the separator.
• the afocal Kepler device has a magnification of -1.
• the expander comprises a divergent/convergent afocal device.
• the divergent/convergent afocal device comprises lenses (classical Galilean afocal), or mirrors (off-axis Cassegrain type afocal).
• the deflector comprises a diasporameter, or a two-axis mirror, making it possible to orient the laser line of sight in the instantaneous imaging field.
• the deflector makes it possible to improve the compensation of the residual movement defects of the orientation device of the motorized line of sight to ensure the quality of the pointing of the beam in a tracking loop using the laser return seen by the track. of imagery.
• the deflector also makes it possible to harmonize the directions of the laser and imaging optical axes. Finally, placing this device as close as possible to the output makes it possible to minimize the dimension of the output laser optical components and therefore of the orientation device of the line of sight.
• the compensator comprises at least one off-center spherical or aspherical dioptric component.
• the compensator is an optical component making it possible to correct the aberrations introduced by the eccentricity of the laser pupil with respect to the dome, which makes it possible to guarantee the quality of the laser beam. It is also proposed, according to another aspect of the invention, a platform provided with a system as described above.
• the platform can be a combat aircraft, a transport aircraft, a military aircraft, a drone, a building, a land vehicle or a ship.
• FIG.1 schematically illustrates an omnidirectional optronic system, according to the state of the art
• FIG.2 schematically illustrates another omnidirectional optronic system, according to the state of the art.
• FIG.3 schematically illustrates an omnidirectional optronic system, according to one aspect of the invention.
• Figure 3 is illustrated an omnidirectional optronic system with two axes of rotation, a carrier axis 1 and a carried axis 2 perpendicular to each other.
• the system comprises an imaging channel 3 and a laser channel 4, in which the laser channel 4 at the injection or emission input to the system and the imaging channel 3 are concentric along the carrier axis 1 .
• the laser channel 4 comprises:
• a first reflective surface 5 arranged at the input of the injection system, configured to separate the laser path 4 from the imaging path 3 by reflecting the injected laser beam so as to move it away from the carrier axis 1 of the system;
• an expander 8a configured to increase the diameter of the laser beam reflected by the second reflective surface 6 and reduce its divergence
• a deflector 8b configured to modify the angular direction of the laser beam inside a cone with an apex angle comprised between 3° and 6°;
• a compensator 11 configured to compensate for aberrations of the exit window 7 in the form of a spherical dome
• Imaging channel 3 includes:
• the imaging channels 3 and laser 4 are concentric on the carrier axis 1 at the injection on the latter.
• the angular coverage of the optronic system is carried out in full (>2TT sr) by solving the problem of the singular point by means of the deflector 8b acting on the laser path 4.
• the fourth reflective surface 10, the eighth reflective surface 17, the second group of lenses 13, and the compensator 11 form a second assembly linked in rotation along the carried axis 2.
• the system also comprises a first support 18 of the assembly connected in rotation along the carrier axis 1, provided with carrier bearings allowing rotation along the carrier axis 1.
• the system comprises a second support 19 of the assembly linked in rotation along the carried axis 2, provided with support bearings allowing rotation along the carried axis 2.
• the Kepler afocal device 12, 13 has a magnification comprised in the range of values [-2; -0.5], for example substantially -1.
• the expander is a divergent/convergent afocal device depending on the propagation of the laser.
• Such an afocal can be achieved, for example, using lenses (classical Galilean afocal) or mirrors (off-axis Cassegrain type afocal).
• the deflector can comprise a diasporameter, or a two-axis mirror making it possible to move the laser line of sight in the instantaneous imaging field.
• the compensator may comprise one or more off-center spherical or aspherical dioptric components.
• a system according to the invention is mounted on a platform which can be a combat aircraft, a transport aircraft, a military aircraft, a drone, a building, a land vehicle or a ship.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Combustion & Propulsion (AREA)
• Chemical & Material Sciences (AREA)
• Physics & Mathematics (AREA)
• Radar, Positioning & Navigation (AREA)
• Remote Sensing (AREA)
• Computer Networks & Wireless Communication (AREA)
• General Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Optics & Photonics (AREA)
• Lenses (AREA)
• Optical Radar Systems And Details Thereof (AREA)
• Variable-Direction Aerials And Aerial Arrays (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=76034655

Family Applications (1)

Country Status (6)

Family Cites Families (9)

• 2020
  • 2020-12-03 FR FR2012572A patent/FR3117203B1/fr active Active
• 2021
  • 2021-11-30 ES ES21823265T patent/ES3017137T3/es active Active
  • 2021-11-30 IL IL303405A patent/IL303405B1/en unknown
  • 2021-11-30 US US18/039,923 patent/US12241724B2/en active Active
  • 2021-11-30 EP EP21823265.0A patent/EP4256268B1/de active Active
  • 2021-11-30 WO PCT/EP2021/083478 patent/WO2022117532A1/fr not_active Ceased

Also Published As

Similar Documents

Legal Events